[{"phone":"+33671974813"},{"phone":"+33.6.71.97.48.13"},{"phone":"+33 6 71 97 48 13"},{"phone":"+43671974813"}]

db.collection.aggregate([{"$set":{"phone":{"$reduce":{"input":{"$regexFindAll":{"input":"$phone","regex":"^\\+|\\d+"}},"initialValue":"","in":{"$concat":["$$value","$$this.match"]}}}}},{"$match":{"$expr":{"$regexMatch":{"input":"$phone","regex":"\\+3367197"}}}}])